Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
OPERATING REVENUES
Leasing	$ 1,830,000	$ 1,552,000	$ 5,226,000	$ 4,605,000
Operating revenues	3,437,000	2,810,000	9,385,000	8,312,000
OPERATING COSTS AND EXPENSES
Leasing	584,000	620,000	1,762,000	1,904,000
General and administrative	466,000	795,000	1,816,000	2,351,000
Share-based compensation	374,000	307,000	1,346,000	1,206,000
Depreciation	417,000	443,000	1,280,000	1,328,000
Total operating costs and expenses	3,138,000	4,298,000	9,741,000	11,056,000
OPERATING INCOME (LOSS)	299,000	(1,488,000)	(356,000)	(2,744,000)
Pension and other post-retirement expenses	(258,000)	(102,000)	(768,000)	(306,000)
Interest expense	(50,000)	(37,000)	(160,000)	(111,000)
NET LOSS	(9,000)	(1,627,000)	(1,284,000)	(3,161,000)
Pension, net of income taxes of $0	211,000	185,000	634,000	555,000
COMPREHENSIVE INCOME (LOSS)	$ 202,000	$ (1,442,000)	$ (650,000)	$ (2,606,000)
NET LOSS PER COMMON SHARE
--BASIC AND DILUTED (in dollars per share)		$ (0.09)	$ (0.07)	$ (0.17)
Real Estate [Member]
OPERATING REVENUES
Operating revenues	$ 305,000	$ 66,000	$ 671,000	$ 402,000
OPERATING COSTS AND EXPENSES
Operating costs	352,000	1,311,000	873,000	1,820,000
Public Utilities [Member]
OPERATING REVENUES
Operating revenues	1,060,000	900,000	2,737,000	2,414,000
OPERATING COSTS AND EXPENSES
Operating costs	726,000	593,000	1,913,000	1,634,000
Resort Amenities and Other [Member]
OPERATING REVENUES
Operating revenues	242,000	292,000	751,000	891,000
OPERATING COSTS AND EXPENSES
Operating costs	$ 219,000	$ 229,000	$ 751,000	$ 813,000